Inductive Proximity Sensors for Metal Detection
Product Announcement from Fargo Controls, Inc.
Fargo Controls offers inductive proximity sensors for detecting the presence of metallic objects.
Their operating principle is based on a coil and high frequency oscillator that creates a field in the close surroundings of the sensing surface. The presence of metal in the operating area causes a change in the oscillation amplitude. This change is identified by a threshold circuit, which changes the output of the sensor.
The operating distance of the sensor depends on the coil's size as well as the target's shape, size and material.